I applied in-person. I interviewed at American Express (Londres, Angleterre) in Nov 2013
Interview
Description for London. A very similar process to all other consulting jobs - submit your CV, take an online assessment. If you are successful, you have 2 interviews in the first round, 2 in the second round, and one as the final round. All have two parts - CV part and a case part. Very similar to the consulting top companies - McKinsey and such.
Interview questions [1]
Question 1
No very ugly questions. Be prepared to answer what other companies you are applying for and why you prefer American Express. I was asked in the second round by both interviewers these questions and they went after me. Know how to solve case studies, the ones given to me were not extremely difficult, but practice, practice, practice makes perfect.
First round consisted of two case interviews with two different analysts. The cases differed based on the different interviewers. One case was interviewer led and the other was interviewee led
Interview questions [1]
Question 1
One was a structured case with different questions and the other was just one open ended question